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Texas Instruments SN74HC125PWRE4
- Part No.:
- SN74HC125PWRE4
- Manufacturer:
- Texas Instruments
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74HC125PWRE4.pdf
- Description:
- IC BUFFER NON-INVERT 6V 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,782
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Product details
Overview
SN74HC125PWRE4 from Texas Instruments is a quadruple non-inverting buffer with 3-state outputs, designed for bus interface and signal routing in digital logic systems. It operates across 2 V to 6 V supply voltage, supports –40°C to +85°C ambient temperature, delivers propagation delay as low as 11 ns at 6 V, and drives up to 10 LSTTL loads. It is used in bidirectional data bus control where output enable sequencing prevents contention.
For engineers reviewing the SN74HC125PWRE4 datasheet, SN74HC125PWRE4 pinout, SN74HC125PWRE4 application, or SN74HC125PWRE4 equivalent, key selection criteria include 3-state timing (enable/disable delays), output drive strength at 4.5 V/6 V, thermal resistance (RθJA = 151.7°C/W), input transition time compliance (≤400 ns at 6 V), and TSSOP-14 package compatibility with high-density PCB layouts.
Technical Context
This device implements four independent positive-logic buffers (Y = A) with active-low 3-state output enables (OE). Each channel features balanced CMOS outputs capable of sourcing/sinking ≥6 mA at 4.5 V while maintaining VOH ≥3.98 V and VOL ≤0.33 V under load.
It uses standard CMOS inputs with ≤10 pF capacitance and ±1 µA leakage, requiring fast input edges (≤400 ns transition time at 6 V) to avoid shoot-through current. The 3-state mode exhibits ≤5 µA leakage (IOZ) and high-impedance isolation critical for bus arbitration and power-gated subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2 V to 6 V - supports mixed-voltage system interfacing (e.g., 3.3 V MCU to 5 V peripheral) |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded control and instrumentation |
| Propagation Delay | 11 ns max at 6 V, CL = 50 pF - enables reliable timing in 30+ MHz bus cycles |
| Output Drive | ±6 mA at 4.5 V - sufficient to drive 10 LSTTL loads without external buffering |
| 3-State Leakage | ±5 µA max at 6 V - ensures minimal bus leakage during disable, preserving signal integrity |
| Input Capacitance | 10 pF max - limits capacitive loading on upstream drivers and preserves edge rate fidelity |
| Power Dissipation Cap. | 45 pF per gate - enables accurate dynamic power estimation in CMOS logic networks |
Pinout & Package
TSSOP-14 package (5.00 mm × 4.40 mm body size), 0.65 mm lead pitch, thin-profile surface-mount construction optimized for automated assembly and thermal performance in space-constrained designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 (1OE, 2OE, 3OE, 4OE) | Active-low output enable | Controls 3-state output independently per channel; low = enabled, high = high-Z |
| 2, 5, 9, 12 (1A, 2A, 3A, 4A) | Buffer input | CMOS-compatible digital input; must be terminated to VCC or GND if unused |
| 3, 6, 8, 11 (1Y, 2Y, 3Y, 4Y) | Buffered 3-state output | Non-inverting output; high-Z when corresponding OE is high; drives bus or downstream logic |
| 7 (GND) | Ground reference | Primary return path for all I/O and supply currents; requires low-impedance PCB plane connection |
| 14 (VCC) | Positive supply | Single power rail for all channels; requires local 0.1 µF ceramic decoupling capacitor |
Key Features
| Feature | Design Value |
|---|---|
| Quadruple 3-state buffer architecture | Enables independent control of four data lines-ideal for 4-bit parallel bus gating or isolated signal routing |
| Balanced CMOS output drive | Sources and sinks matched current (≥6 mA), minimizing skew between rising/falling edges on shared buses |
| Wide supply voltage range | Operates from 2 V to 6 V-supports direct interfacing between 2.5 V, 3.3 V, and 5 V logic domains without level shifters |
| Low dynamic power consumption | ICC ≤80 µA at 6 V - reduces standby power in battery-backed or energy-sensitive applications |
| Standard CMOS input structure | High-impedance, low-leakage (±1 µA) inputs simplify termination and reduce loading on driving sources |
Applications
| Bus Isolation in Microcontroller Systems | Level Translation Interface |
|---|---|
Use Scenario: Isolating an MCU's GPIO port from a peripheral bus during sleep mode to prevent back-powering and leakage. IC Role / Device Role / Timing Role: SN74HC125PWRE4 acts as a 4-channel directional buffer; OE lines synchronized to MCU power state to place outputs in high-Z. Use Value: Eliminates need for discrete MOSFET switches; maintains signal integrity with <11 ns propagation delay and <31 ns disable time at 6 V. | Use Scenario: Interfacing a 3.3 V FPGA I/O bank to legacy 5 V address/data bus without dedicated level translators. IC Role / Device Role / Timing Role: SN74HC125PWRE4 serves as unidirectional voltage-tolerant buffer; powered at 5 V while accepting 3.3 V logic-high inputs (VIH = 3.15 V min). Use Value: Leverages wide VCC range and CMOS input thresholds to achieve robust 3.3 V → 5 V translation with no additional components. |
| Digital Test Fixture Signal Routing | Industrial Sensor Data Multiplexing |
Use Scenario: Routing test signals from multiple DUTs to a single logic analyzer channel using programmable enable control. IC Role / Device Role / Timing Role: SN74HC125PWRE4 functions as a 4-input multiplexer substitute; one channel enabled at a time via microcontroller GPIO. Use Value: Provides clean, glitch-free switching with <31 ns disable delay and <5 µA 3-state leakage-prevents crosstalk between inactive channels. | Use Scenario: Consolidating analog sensor digitized outputs (e.g., 4x ADCs) onto a shared SPI or parallel data bus in PLC modules. IC Role / Device Role / Timing Role: SN74HC125PWRE4 buffers and gates each ADC's parallel output word; OE controlled by sequencer to avoid bus contention. Use Value: Ensures deterministic timing (tpd = 14 ns typ. at 4.5 V) and noise-immune 3-state isolation between sensors sharing same bus traces. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buffer-with-3-state-output applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC125APWRE4 | Lower VCC range (1.65 V–5.5 V); higher speed (tpd = 3.7 ns @ 3.3 V); lower drive (±24 mA @ 3.3 V) | Better suited for 1.8 V/3.3 V-only systems; not rated for 5 V operation | Select when operating below 5 V and requiring faster switching or lower power; verify 3.3 V VIH/VIL margins match driver. |
| 74AHC125PW,118 | Higher drive (±8 mA @ 5 V); wider temp range (–40°C to +125°C); identical pinout and function | Preferred for automotive under-hood or extended-temp industrial use; same footprint | Choose for enhanced thermal robustness and marginally stronger drive; drop-in replacement in TSSOP-14 layout. |
Compared with SN74HC125PWRE4, SN74LVC125APWRE4 offers superior speed and low-voltage support but sacrifices 5 V compatibility, while 74AHC125PW,118 provides identical functionality with extended temperature rating and slightly higher output current-making it ideal for harsh-environment deployments without PCB changes.
Availability
SN74HC125PWRE4 is available at Aetrix Electronics and suitable for industrial control panels, test equipment interfaces, and embedded communication modules requiring stable component supply, long-term manufacturability, and RoHS-compliant TSSOP packaging.
Supply support for SN74HC125PWRE4 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader delivering analog, embedded processing, and logic solutions for industrial, automotive, and communications markets.
The SN74HC125PWRE4 belongs to TI's 74HC logic family, engineered for high noise immunity, low power consumption, and seamless interoperability across mixed-voltage digital systems.
FAQ
What is the maximum recommended capacitive load for SN74HC125PWRE4?
The SN74HC125PWRE4 is characterized for optimal timing performance with ≤50 pF load capacitance, though it can reliably drive up to 70 pF per output. Exceeding this may increase propagation delay and transition time beyond datasheet limits-especially at 2 V supply-so series resistors or layout optimization are advised for heavier loads. The SN74HC125PWRE4 datasheet specifies CL = 50 pF for all switching characteristics.
Does SN74HC125PWRE4 support 5 V operation?
Yes, SN74HC125PWRE4 fully supports 5 V operation within its 2 V to 6 V supply range. At VCC = 5 V, it delivers VOH ≥4.4 V (IOH = –20 µA), VOL ≤0.1 V (IOL = 20 µA), and propagation delay ≤14 ns (CL = 50 pF). Its input thresholds (VIH = 3.15 V, VIL = 1.35 V at 4.5 V) ensure compatibility with standard 5 V TTL and CMOS logic families.
How should unused inputs and outputs be handled on SN74HC125PWRE4?
Unused inputs on SN74HC125PWRE4 must be terminated to VCC or GND-never left floating-to prevent undefined logic states and excessive current draw. Unused outputs may be left unconnected (floating) since they enter high-impedance mode when OE is high. For robust ESD protection and noise immunity, tie unused OEs to VCC (disable) and unused As to GND or VCC depending on required default state.
What is the thermal resistance (RθJA) of SN74HC125PWRE4 in its TSSOP-14 package?
The SN74HC125PWRE4 in TSSOP-14 (PW) package has a junction-to-ambient thermal resistance (RθJA) of 151.7°C/W, as specified in the TI datasheet SCLS104F. This value assumes standard JEDEC 2-layer board conditions; actual thermal performance improves with PCB copper area, thermal vias, and airflow. The SN74HC125PWRE4's low ICC (≤80 µA) minimizes self-heating under static conditions.
Is SN74HC125PWRE4 pin-compatible with other 74HC125 variants?
Yes, SN74HC125PWRE4 shares identical pinout and function with all 14-pin 74HC125 variants-including SOIC (D), SSOP (DB), PDIP (N), and SO (NS) packages-as confirmed by TI's functional pinout diagram and Pin Functions table. All variants use the same 1–14 pin numbering, including 1OE/1A/1Y/2OE/2A/2Y/GND/VCC/4OE/4A/4Y/3OE/3A/3Y arrangement. The SN74HC125PWRE4 differs only in package dimensions and thermal metrics.
SN74HC125PWRE4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74HC
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 4
- Number of Bits per Element:
- 1
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 7.8mA, 7.8mA
- Voltage - Supply:
- 2V ~ 6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
SN74HC125PWRE4 FAQ
1.How can I place an order for SN74HC125PWRE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74HC125PWRE4 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SN74HC125PWRE4 reliable?
The price and inventory of SN74HC125PWRE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74HC125PWRE4 is usually 5 days.
3.What payment methods are accepted for SN74HC125PWRE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74HC125PWRE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74HC125PWRE4?
SN74HC125PWRE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74HC125PWRE4 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SN74HC125PWRE4?
For technical support, including SN74HC125PWRE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74HC125PWRE4 requirements.
6.How does Aetrix verify that SN74HC125PWRE4 is sourced from the original manufacturer or authorized distributors?
All SN74HC125PWRE4 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SN74HC125PWRE4 meets industry standards.
7.What is the process for return or replacement of SN74HC125PWRE4?
All SN74HC125PWRE4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74HC125PWRE4, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SN74HC125PWRE4 part is unused and in its original packaging.
Return procedure for SN74HC125PWRE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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